org.springframework.cloud.stream.reflection

Class GenericsUtils

java.lang.Object

org.springframework.cloud.stream.reflection.GenericsUtils

public abstract class GenericsUtils
extends Object

Internal utilities for handling generics.

Author:

Marius Bogoevici

Constructor Summary

Constructors

Constructor and Description
GenericsUtils()

Method Summary

Modifier and Type	Method and Description
static Class<?>	getParameterType(Class<?> evaluatedClass, Class<?> interfaceClass, int position) For a specific class that implements or extends a parametrized type returns the parameter of that interface at a given position.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GenericsUtils

public GenericsUtils()

Method Detail

getParameterType

public static Class<?> getParameterType(Class<?> evaluatedClass,
                                        Class<?> interfaceClass,
                                        int position)

For a specific class that implements or extends a parametrized type returns the parameter of that interface at a given position. For example, for this class:

 
 class MessageChannelBinder implements Binder<MessageChannel, ?, ?>
 

 
 
 getParameterType(MessageChannelBinder.class, Binder.class, 0);
 

 will return  Binder

Parameters:

evaluatedClass - the evaluated class

interfaceClass - the parametrized interface

position - the position

Returns:

the parameter type if any

Throws:

IllegalStateException - if the evaluated class does not implement the interface or